public class TestDemo {
    public static void main(String[] args) {
        int[] arr = {1, 52, 44, 82, 72, 62, 7, 256, 4};
        String S = ArrayUtil.arrprint(arr);
        System.out.println(S);
        double[] arr2 = {1, 52, 44, 82, 72, 62, 7, 256, 4} ;
        double ret = ArrayUtil.average(arr2);
        System.out.println(ret);

    }
}